Method for the preparation of 5,11-dihydro-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepines
申请人:BOEHRINGER INGELHEIM PHARMACEUTICALS INC.
公开号:EP0482481A1
公开(公告)日:1992-04-29
A method for preparing certain 5,11-dihydro-6H-dipyrido(3,2-b:2',3'-e][1,4]diazepines which comprises the following steps:
1. converting a 2,6-dichloro-3-pyridinecarboxamide to a 2,6-dichloro-3-aminopyridine by Hofmann Rearrangement;
2. reacting the 2,6-dichloro-3-aminopyridine with a 2-chloronicotonic acid to produce a 2,6-dichloro-3-(2'-chloro-3'-nicotinyl)carboxamidopyridine;
3. reacting the 2,6-dichloro-3-(2'-chloro-3'-nicotinyl) carboxamidopyridine with an amine to produce a 2,6-dichloro-3-(2'-amino-3'-nicotinyl)carboxamidopyridine; and
4. hydrogenating the 2,6-dichloro-3-(2'-amino-3'-nicotinyl)carboxamidopyridine to produce the 5,11-dihydro-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepine.
一种制备某些 5,11-二氢-6H-二吡啶并(3,2-b:2',3'-e][1,4]二氮杂卓的方法,包括以下步骤:
通过霍夫曼重排将 2,6-二氯-3-吡啶甲酰胺转化为 2,6-二氯-3-氨基吡啶;
将 2,6-二氯-3-氨基吡啶与 2-氯烟酸反应,生成 2,6-二氯-3-(2'-氯-3'-烟酸基)羧酰胺基吡啶; 3;
将 2,6-二氯-3-(2'-氯-3'-烟酸基)羧酰胺基吡啶与胺反应,生成 2,6-二氯-3-(2'-氨基-3'-烟酸基)羧酰胺基吡啶; 4.
将 2,6-二氯-3-(2'-氨基-3'-烟酸基)羧酰胺吡啶氢化,生成 5,11-二氢-6H-二吡啶并[3,2-b:2',3'-e][1,4]二氮杂卓。